CN202333089U - Band-stop filter and signal processing equipment - Google Patents
Band-stop filter and signal processing equipment Download PDFInfo
- Publication number
- CN202333089U CN202333089U CN2011204464524U CN201120446452U CN202333089U CN 202333089 U CN202333089 U CN 202333089U CN 2011204464524 U CN2011204464524 U CN 2011204464524U CN 201120446452 U CN201120446452 U CN 201120446452U CN 202333089 U CN202333089 U CN 202333089U
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- lhm
- stop filter
- unit
- band stop
- transmission line
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Abstract
The utility model discloses a band-stop filter which belongs to the field of filters. The band-stop filter comprises a reflective plate, a medium layer, a main transmission line and a left-handed material unit, wherein the reflective plate and the main transmission line are adhered to two sides of the medium layer; and the left-handed material unit is further arranged on at least one side of the two sides of the medium layer. According to the utility model, the left-handed material unit is arranged on at least one side of the two sides of the medium layer, so that functions of the band-stop filter are realized by utilizing the characteristic of left-handed material, and compared with the conventional band-stop filter with a micro-strip structure, the band-stop filter based on the left-handed material has better performance.
Description
Technical field
The utility model relates to filter field, particularly a kind of band stop filter and signal handling equipment.
Background technology
Filter is being brought into play important effect as important passive device in the feed system in feed system.Wherein, band stop filter is meant can be through most of frequency components but the frequency component of some scope is decayed to extremely low-level filter, relative with the notion of band pass filter.With respect to the metallic cavity filter of main flow in the present industry, the band stop filter of microstrip structure is little with its size, be easy to processing, be easy to advantages such as integrated with other active circuit elements through photoetching technique, is applied in many circuit design.
In the prior art; Referring to Fig. 1 a and Fig. 1 b; Be respectively the side-looking structural representation and the main TV structure sketch map of band stop filter of the microstrip structure of prior art; Specifically be to be made up of reflecting plate 101, dielectric layer 102, main transmission line 103 and a plurality of nodel lines 104, reflecting plate 101 is claimed floor or backboard etc. again; Wherein, reflecting plate 101 is attached to a side of dielectric layer 102, main transmission line 103 and a plurality of nodel lines 104 opposite side attached to dielectric layer 102, and these nodel lines 104 are vertical with main transmission line 103.The Q value of the band stop filter of this microstrip structure is lower, poor performance, and when reaching certain stopband and suppress, the side frequency point insertion loss ratio of passband is bigger; And because the existence of a nodel line makes that the band stop filter overall dimensions of microstrip structure is bigger, product cost is high.
The utility model content
In order to solve prior art problems, the utility model embodiment provides a kind of band stop filter and signal handling equipment.Said technical scheme is following:
A kind of band stop filter, said band stop filter comprises: reflecting plate, dielectric layer, main transmission line and LHM unit;
Said reflecting plate and said main transmission line are attached to the both sides of said dielectric layer;
At least one side in the said both sides also has the LHM unit.
A kind of signal handling equipment, said signal handling equipment comprises above-mentioned band stop filter.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
Through design LHM unit at least one side in the both sides of dielectric layer; And then the characteristic of utilizing LHM has realized the function of band stop filter; Compare with the band stop filter of traditional microstrip structure, the performance of this band stop filter based on LHM is better, and compact conformation, is easy to processing; Both practice thrift cost, improved product competitiveness again.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 a is the side-looking structural representation of the band stop filter of the microstrip structure that provides of prior art;
Fig. 1 b is the main TV structure sketch map of the band stop filter of the microstrip structure that provides of prior art;
The side-looking structural representation of Fig. 2 a band stop filter that to be the utility model embodiment one provide with embodiment two;
The main TV structure sketch map of Fig. 2 b band stop filter that to be the utility model embodiment one provide with embodiment two;
Fig. 3 is the structural representation of the rotten LHM unit of carving on the reflecting plate that provides of the utility model embodiment two;
Fig. 4 band stop filter that to be the utility model embodiment two provide with embodiment three is to the attenuation degree sketch map of stopband signal;
The structural representation of Fig. 5 a a kind of LHM unit that to be the utility model embodiment two provide with embodiment three;
The structural representation of Fig. 5 b another kind of LHM unit that to be the utility model embodiment two provide with embodiment three;
Fig. 6 a is the side-looking structural representation of the band stop filter that provides of the utility model embodiment three;
Fig. 6 b is the main TV structure sketch map of the band stop filter that provides of the utility model embodiment three.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model execution mode is done to describe in detail further below.
LHM (Left Handed Material; LHM) be the hot issue of current electromagnetism area research; It is that a kind of dielectric constant and magnetic permeability are the electromagnetic material of negative value simultaneously, gains the name because of electromagnetic electric field intensity, magnetic vector and the wave vector direction of propagating therein satisfies left hand rule.
Also do not find natural LHM at occurring in nature, present employed LHM is to be made up of the LHM unit.The structure of LHM unit can be various, and it has the functional characteristic of LHM.When alternating magnetic field during from axially the passing of LHM unit; At the magnetic permeability of resonance frequency place appearance of negative, thereby one section narrow stopband near resonance frequency, occurs, and the stopband edge is precipitous; Effectively hindered electromagnetic passing through, this is the intrinsic characteristic of LHM.The utility model is exactly a kind of band stop filter based on LHM that utilized this characteristics design.
Embodiment one
Referring to Fig. 2 a and 2b, the utility model embodiment provides a kind of band stop filter, and this band stop filter comprises: reflecting plate 201, dielectric layer 202, main transmission line 203 and LHM unit;
Reflecting plate 201 and the both sides of main transmission line 203 attached to dielectric layer 202, and at least one side in these both sides also has the LHM unit.
Alternatively, at least one side in these both sides also has the LHM unit, specifically can be carved with the LHM unit for corruption on the reflecting plate 201, perhaps, has attached to the LHM unit on the dielectric layer 202 at least one side of main transmission line 203.
Further alternatively, when the both sides of main transmission line 203 all had attached to the LHM unit on the dielectric layer 202, the LHM unit of both sides was that axial symmetry is arranged on the dielectric layer 202 with main transmission line 203.
Further alternatively, the LHM unit is made up of split ring resonator.Wherein, split ring resonator can be opening straight-flanked ring or annulus.When split ring resonator when being a plurality of, can have I-shaped metal wire between these split ring resonators.
Further alternatively, the LHM unit can be for one or more.When LHM unit when being a plurality of, these LHM unit can be parallel to main transmission line 203 and arrange.
The band stop filter that the utility model embodiment provides; Through design LHM unit at least one side in the both sides of dielectric layer, and then utilize the characteristic of LHM to realize the function of band stop filter, compare with the band stop filter of traditional microstrip structure; The performance of this band stop filter based on LHM is better; And compact conformation, be easy to processing, both practiced thrift cost, improved product competitiveness again.
Embodiment two
The utility model embodiment provides a kind of band stop filter, and referring to Fig. 2 a, Fig. 2 b and Fig. 3, this band stop filter comprises: reflecting plate 201, dielectric layer 202, main transmission line 203 and LHM unit 204; Wherein, reflecting plate 201 is a metal material with main transmission line 203, and dielectric layer 202 is a non-metallic material, like polytetrafluoroethylene, pottery, resin material etc.
Particularly, reflecting plate 201 and the both sides of main transmission line 203 attached to dielectric layer 202.
Referring to Fig. 3, LHM unit 204 is carved with in corruption on the reflecting plate 201, and shown in the structure in the frame of broken lines among Fig. 3, this LHM unit 204 is the pattern of hollow out, can see dielectric layer 202 through this LHM unit 204.In order to see clearly Chu, the reflecting plate 201 among Fig. 3 is not beaten shade.Having carved four LHM unit with corruption among Fig. 3 is example, but is not limited to this, can rottenly carve one or more LHMs unit.The reflecting plate 201 that LHM unit 204 is carved with in corruption has just had the functional characteristic of LHM; When alternating magnetic field during from axially the passing of LHM unit 204; Magnetic permeability in resonance frequency place appearance of negative; Thereby one section narrow stopband near resonance frequency, occurs, and the stopband edge is precipitous, can effectively hinder electromagnetic passing through.
The two ends 203a and the 203b of main transmission line 203 connect feed system.When the end of signal through the main transmission line 203 of this band stop filter sent to the opposite end, passband signal just can send to the opposite end through main transmission line 203, and the stopband signal sends less than the opposite end then by LHM unit 204 reflected back transmitting terminals.This band stop filter is as shown in Figure 4 to the attenuation degree sketch map of stopband signal, and sunk part is the attenuation degree of stopband signal.
Further; LHM unit 204 can be made up of split ring resonator as shown in Figure 3; Can also constitute by the split ring resonator shown in Fig. 5 a; Also can constitute jointly, have I-shaped metal wire between the promptly adjacent split ring resonator by I shape metal wire and the split ring resonator shown in Fig. 5 b.That is to say that the shape of LHM unit 204 can be various, comprise but be not limited to above several kinds.Wherein, split ring resonator is shapes such as opening straight-flanked ring or opening annulus.If a plurality of LHMs unit has been carved in corruption on the reflecting plate 201, the shape of these LHM unit can be identical, also can be different.
Further; If a plurality of LHMs unit has been carved in corruption on the reflecting plate 201; Its spread pattern can be various, can be that a plurality of LHMs unit is parallel to the main transmission line arrangement, and is as shown in Figure 3; And the axis of these LHM unit is near more from main transmission line, and it is good more that the performance of LHM is brought into play; Rotten LHM unit further of carving is arrangement at random on the reflecting plate 201.Wherein, the opening direction of each LHM unit outer shroud can be identical, also can be different.
In practical application, this band stop filter can be applied in the various signal handling equipments, like the base station, or subscriber equipment such as mobile phone.
The band stop filter that the utility model embodiment provides is carved the LHM unit through rotten on reflecting plate, and then utilizes the characteristic of LHM to realize the function of band stop filter; Compare with the band stop filter of traditional microstrip structure, the Q value of this band stop filter based on LHM is high, and the stopband edge is precipitous; Performance is good; And compact conformation, be easy to processing, both practiced thrift cost, improved product competitiveness again.
Embodiment three
The utility model embodiment provides a kind of band stop filter, referring to Fig. 6 a and 6b, is respectively the side-looking and the main TV structure sketch map of this band stop filter.This band stop filter comprises: reflecting plate 601, dielectric layer 602, main transmission line 603 and LHM unit 604; Wherein, reflecting plate 601, main transmission line 603 and LHM unit 604 are metal material, and dielectric layer 202 is a non-metallic material, like polytetrafluoroethylene, pottery, resin material etc.
Particularly, reflecting plate 601 and the both sides of main transmission line 603 attached to dielectric layer 602.
At least one side at main transmission line 603 has attached to the LHM unit 604 on the dielectric layer 602, shown in the structure in the frame of broken lines among Fig. 6 b.Be that example describes respectively to have adhered to four LHM unit in main transmission line 603 both sides among Fig. 6 b, but be not limited to this, can only adhere to the LHM unit in the practical application, and the number that adheres to can be one or more in a side of main transmission line 603.When the both sides of main transmission line all had attached to the LHM unit on the dielectric layer, these LHM unit can be that axial symmetry is arranged on the dielectric layer with the main transmission line, and the effect that suppresses the closer to the main transmission line stopband is obvious more.
Two termination feed systems of main transmission line 603.When the end of signal through the main transmission line 203 of this band stop filter sent to the opposite end, passband signal just can send to the opposite end through main transmission line 603, and the stopband signal sends less than the opposite end then by LHM unit 604 reflected back transmitting terminals.This band stop filter is as shown in Figure 4 to the attenuation degree sketch map of stopband signal.
Further; LHM unit 604 can be made up of the split ring resonator shown in Fig. 6 b; Can also constitute by the split ring resonator shown in Fig. 5 a; Also can constitute jointly, have I-shaped metal wire between the promptly adjacent split ring resonator by I shape metal wire and the split ring resonator shown in Fig. 5 b.That is to say that the shape of LHM unit 604 can be various, comprise but be not limited to above several kinds.Wherein, split ring resonator is shapes such as opening straight-flanked ring or opening annulus.If adhered to a plurality of LHMs unit on the dielectric layer 602, the shape of these LHM unit can be identical, also can be different.
Further, if adhered to a plurality of LHMs unit on the dielectric layer 602, its spread pattern can be various; Can be that a plurality of LHMs unit is parallel to the main transmission line arrangement; Shown in Fig. 6 b, and the opening direction of each LHM unit outer shroud can be identical, also can be different; Can also be the arrangement at random of a plurality of LHMs unit, the opening direction of each LHM unit outer shroud can be identical, also can be different.
In practical application, this band stop filter can be applied in the various signal handling equipments, like the base station, or subscriber equipment such as mobile phone.
The band stop filter that the utility model embodiment provides adheres to the LHM unit through the both sides of main transmission line on dielectric layer, and then utilizes the characteristic of LHM to realize the function of band stop filter; Compare with the band stop filter of traditional microstrip structure, the Q value of this band stop filter based on LHM is high, and the stopband edge is precipitous; Performance is good; And compact conformation, be easy to processing, both practiced thrift cost, improved product competitiveness again.
Embodiment four
The utility model embodiment provides a kind of signal handling equipment, and this signal handling equipment can comprise the band stop filter of mentioning in the foregoing description one to embodiment three.This signal handling equipment can be the arbitrary signal treatment facility in the wireless communication system, like the base station, or subscriber equipment such as mobile phone etc.
In sum, the utility model embodiment compares with the band stop filter of traditional microstrip structure through the function of LHM unit realization band stop filter; The Q value of this band stop filter based on LHM is high; And the stopband edge is precipitous, and performance is good, and compact conformation, be easy to processing; Both practice thrift cost, improved product competitiveness again.
Need to prove: the band stop filter that the foregoing description provides is when filtering; Only the division with above-mentioned each function element is illustrated; In the practical application; Can as required above-mentioned functions be distributed by the completion of different functions device, the internal structure that is about to band stop filter is divided into the different functions device, to accomplish all or part of function of above description.
Above-mentioned the utility model embodiment sequence number is not represented the quality of embodiment just to description.
The all or part of step that one of ordinary skill in the art will appreciate that realization the foregoing description can be accomplished through hardware; Also can instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (9)
1. a band stop filter is characterized in that, said band stop filter comprises: reflecting plate, dielectric layer, main transmission line and LHM unit;
Said reflecting plate and said main transmission line are attached to the both sides of said dielectric layer;
At least one side in the said both sides also has the LHM unit.
2. band stop filter according to claim 1 is characterized in that, at least one side in the said both sides also has the LHM unit, comprising:
Said LHM unit is carved with in corruption on the said reflecting plate, perhaps, has attached to the said LHM unit on the said dielectric layer at least one side of said main transmission line.
3. band stop filter according to claim 2; It is characterized in that; When the both sides of said main transmission line had attached to the said LHM unit on the said dielectric layer, said LHM unit was that axial symmetry is arranged on the said dielectric layer with said main transmission line.
4. band stop filter according to claim 1 is characterized in that, said LHM unit is made up of split ring resonator.
5. band stop filter according to claim 4 is characterized in that, said split ring resonator is opening straight-flanked ring or annulus.
6. band stop filter according to claim 4 is characterized in that, when said split ring resonator when being a plurality of, has I-shaped metal wire between the adjacent split ring resonator.
7. band stop filter according to claim 1 is characterized in that, said LHM unit is one or more.
8. band stop filter according to claim 7 is characterized in that, when said LHM unit when being a plurality of, said LHM unit is parallel to said main transmission line and arranges.
9. a signal handling equipment is characterized in that, said signal handling equipment comprises any described band stop filter of claim like claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204464524U CN202333089U (en) | 2011-11-11 | 2011-11-11 | Band-stop filter and signal processing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204464524U CN202333089U (en) | 2011-11-11 | 2011-11-11 | Band-stop filter and signal processing equipment |
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| Publication Number | Publication Date |
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| CN202333089U true CN202333089U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204464524U Expired - Lifetime CN202333089U (en) | 2011-11-11 | 2011-11-11 | Band-stop filter and signal processing equipment |
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| CN (1) | CN202333089U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022600A (en) * | 2012-12-24 | 2013-04-03 | 中国计量学院 | Symmetric ring twisted-pair-shaped terahertz wave filter |
| CN107134615A (en) * | 2017-06-15 | 2017-09-05 | 中国人民解放军空军工程大学 | A kind of dual-passband suspended mictrostrip filter based on electric Meta Materials |
| CN108365311A (en) * | 2018-02-07 | 2018-08-03 | 东南大学 | Areflexia uniconductor surface wave transmission line bandstop filter |
-
2011
- 2011-11-11 CN CN2011204464524U patent/CN202333089U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022600A (en) * | 2012-12-24 | 2013-04-03 | 中国计量学院 | Symmetric ring twisted-pair-shaped terahertz wave filter |
| CN107134615A (en) * | 2017-06-15 | 2017-09-05 | 中国人民解放军空军工程大学 | A kind of dual-passband suspended mictrostrip filter based on electric Meta Materials |
| CN107134615B (en) * | 2017-06-15 | 2019-08-09 | 中国人民解放军空军工程大学 | A kind of dual-passband suspended mictrostrip filter based on electric Meta Materials |
| CN108365311A (en) * | 2018-02-07 | 2018-08-03 | 东南大学 | Areflexia uniconductor surface wave transmission line bandstop filter |
| CN108365311B (en) * | 2018-02-07 | 2020-02-18 | 东南大学 | Reflection-free single conductor surface wave transmission line band-stop filter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |